body {
  background-color: #000;
  position: relative;
  max-height: 100vh;
  width: 100%;
  overflow: hidden;
}
.videoBack {
  position: fixed;
  top: 40%;
  transform: translateY(-40%);
  cursor: pointer;
  z-index: 999;
}
.videoBack .back {
  position: absolute;
  top: 0;
  left: -80px;
  display: flex;
  align-items: center;
  width: 120px;
  height: 80px;
  background-color: #1d1d1d;
  color: #cdcdcd;
  transition: all 0.3s;
}
.videoBack .back .clickback {
  display: flex;
  flex-direction: column;
  width: 80px;
  height: 80px;
  justify-content: center;
  align-items: center;
}
.videoBack .back .clickback svg {
  width: 30px;
  height: 30px;
}
.videoBack .back .tit {
  position: absolute;
  top: 0;
  left: 80px;
  z-index: 1;
  width: 40px;
  height: 80px;
  background-color: #1d1d1d;
  line-height: 80px;
  text-align: center;
}
.videoBack .back .tit svg {
  width: 20px;
  height: 20px;
}
.videoBack .back:hover {
  color: #fff;
  left: 0px;
}
a {
  text-decoration: none;
}
.player {
  height: 100vh;
  margin: 0 auto;
  background-color: #000;
  position: relative;
}
video {
  display: block;
  height: 100%;
  margin: 0 auto;
}
.controls {
  width: 100%;
  height: 40px;
  background-color: #1c192c;
  position: absolute;
  left: 0px;
  bottom: 0px;
  z-index: 100;
  border-radius: 4px;
}
.controls .switch {
  float: left;
  width: 20px;
  height: 20px;
  color: #fff;
  position: absolute;
  top: 11px;
  left: 11px;
}
.controls .expend {
  float: right;
  width: 20px;
  height: 20px;
  color: #fff;
  position: absolute;
  top: 11px;
  right: 11px;
}
.progress {
  width: 1100px;
  height: 10px;
  border-radius: 3px;
  background-color: #999;
  position: absolute;
  top: 15px;
  left: 234px;
}
.progress .line {
  width: 0;
  height: 100%;
  background-color: #f7f5f5;
  left: 0;
  top: 0;
  position: absolute;
}
.progress .bar {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
}
.times {
  position: absolute;
  top: 11px;
  left: 55px;
  color: #fff;
  font-size: 14px;
}
#select {
  float: right;
  height: 20px;
  background: #1c192c;
  color: #fff;
  position: absolute;
  top: 11px;
  right: 55px;
  border: none;
}
